YOU SAID:

It is my mothers birthday

INTO JAPANESE

私の母親の誕生日です。

BACK INTO ENGLISH

This is my mom's birthday.

INTO JAPANESE

もちろん 母の誕生日です

BACK INTO ENGLISH

Of course there is my mother's birthday

INTO JAPANESE

もちろん私の母の誕生日があります。

BACK INTO ENGLISH

Of course there's my mother's birthday.

INTO JAPANESE

もちろん私の母の誕生日があります。

BACK INTO ENGLISH

Of course there's my mother's birthday.